The United States Coast Guard has published an extremely technical document describing the minimum requirements for sound signaling capabilities for boats.
Vessels less than 20m (65') must have a whistle capable of 120 db at 1 m, and it must be able to be heard 0.5 miles away. Vessels 20-75m (65-246') must have both a whistle and a bell. The whistle must produce 130 db at 1m, and be heard for 1 mile.
HornBlasters is an American company located in Tampa, Florida. Born because of a need to provide the best in the automotive and marine pneumatic suspension and signaling products at the best prices available anywhere. HornBlasters also carries a line of novelty products as well, since we also have a bit of a crazy streak that was bred into the business long ago. HornBlasters has been providing the best pneumatic accessories and obnoxiously loud horns available anywhere in the world since 2003. HornBlasters doesn't just provide other companies' parts to its customers; we are a fully capable manufacturer of air horns and pneumatic solutions, proudly manufactured right here in the USA. We support American businesses and take an enormous amount of pride in offering same-day shipping services. As well as expedited shipping services all over the globe, no matter the size of the shipment, or amount of business we do with your company. Our customer service is second to none, and we're ready to prove it, day-in & day-out.
The REAL Deal
This kit is what you would actually hear on a locomotive. It is a Nathan Air Chime.....and it is not playing around.
The entire kit includes a DC Compressor, 5-gal tank, and all of the hardware. Depending on your installation, you may need extra tubing.